165647712676165 has 4 divisors (see below), whose sum is σ = 198777255211404. Its totient is φ = 132518170140928.

The previous prime is 165647712676157. The next prime is 165647712676213. The reversal of 165647712676165 is 561676217746561.

165647712676165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71224164392481 + 94423548283684 = 8439441^2 + 9717178^2 .

It is a cyclic number.

It is not a de Polignac number, because 165647712676165 - 2³ = 165647712676157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165647712676094 and 165647712676103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16564771267612 + ... + 16564771267621.

It is an arithmetic number, because the mean of its divisors is an integer number (49694313802851).

Almost surely, 2^{165647712676165} is an apocalyptic number.

It is an amenable number.

165647712676165 is a deficient number, since it is larger than the sum of its proper divisors (33129542535239).

165647712676165 is an equidigital number, since it uses as much as digits as its factorization.

165647712676165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33129542535238.

The product of its digits is 533433600, while the sum is 70.

The spelling of 165647712676165 in words is "one hundred sixty-five trillion, six hundred forty-seven billion, seven hundred twelve million, six hundred seventy-six thousand, one hundred sixty-five".